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Openemr CVE-2026-33304

| EUVD-2026-13225 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-03-19 GitHub_M
6.5
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
Patch available
Apr 16, 2026 - 05:29 EUVD
8.0.0.2
EUVD ID Assigned
Mar 19, 2026 - 21:00 euvd
EUVD-2026-13225
Analysis Generated
Mar 19, 2026 - 21:00 vuln.today
CVE Published
Mar 19, 2026 - 20:27 nvd
MEDIUM 6.5

DescriptionGitHub Advisory

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.0.0.2, an authorization bypass in the dated reminders log allows any authenticated non-admin user to view reminder messages belonging to other users, including associated patient names and free-text message content, by crafting a GET request with arbitrary user IDs in the sentTo[] or sentBy[] parameters. Version 8.0.0.2 fixes the issue.

AnalysisAI

An authorization bypass vulnerability in OpenEMR versions prior to 8.0.0.2 allows authenticated non-administrator users to access reminder messages and associated patient information belonging to other users by manipulating GET request parameters. Any authenticated user can view sensitive data including patient names and message content from arbitrary user accounts without proper authorization checks. …

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Vulnerability AssessmentAI

Risk Assessment The CVSS 3.1 vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) indicates this is a network-accessible vulnerability requiring only low-complexity exploitation and valid user credentials, with high confidentiality impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated clinic receptionist with limited EHR access crafts a GET request to the dated reminders log endpoint with sentBy[]=1&sentBy[]=2&sentBy[]=3, iterating through different user IDs. Because no authorization checks validate whether the receptionist should access reminders from physicians or other users, the application returns reminder messages including patient names and free-text clinical notes sent to or by those users. …
Remediation Immediately upgrade OpenEMR to version 8.0.0.2 or later. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-33304 vulnerability details – vuln.today

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